If you mouse over you will see ISO 400. It was my 4 / 40 / 400 exposure recipe for fisheyes. However this was one of my first attempts. I'll have to try some more when this thing appears back in the sky.

To another of your comments, I would definitely not feel that owning a particular camera brand locked me into that brand's lenses.

ken henke wrote:

What ISO did you use. I typically use 1600-3200. From night images I have seen with these cameras, it appears 1600 is good, with more concern over noise at 3200. Fortunately, I don't conduct a lot of night imagery, thus, degradation of image quality above 1600 is not a deal breaker for me.